Neck-yoke.



PATENTED MAY 2, 1905.

G. A. LAMBERT.,

NECK YOKE.

APPLIOATION FILED PEB. 29.1904.

5 u vom l'oz UNITED STATES Patented May 2, 1905.

GEORGE A. LAMBERT, OF ANDERSON, INDIANA.

NECK-YOKE..

SPECIFICATION forming part of Letters Patent No. 788,652, dated May 2, 1905.

Application filed February 29, 1904. Serial No. 195,865.

To @ZZ whom lit-may concern:

Beit knownthat I, GEORGE A. LAMBERT. a citizenof the United States of America, and a resident of Anderson,county of Madison, State of Indiana, have invented certain new and useful Improvements in Neck-Yokes, of which the following is a full and clear specification, reference being had to the accompanying drawings, in which- Figure lis a plan view of a blank of which the bar is formed; Fig. 2, a side elevation of a bar partly formed; Fig. 3, a transverse section on the line 3 3 of Fig. 2; Fig. 4, a side elevation of a bar completely formed ready for the attachment of the hooks at its ends; Fig.v 5, a transverse section through Fig. 4; Figs. 6, 7, 8, 9, 'and 10, transverse sections of various forms of the bar combined with wood fillings; and Fig. 11, a horizontal transverse section on the line 11 l1 vof Fig. 2.

The object of this invention is to provide a neck-yoke or similar bar which shall be very strong and light in weight and shall be capable of being manufactured without the use of wood, the proper sorts of wood having become scarce on the market, as more fully herein set forth.

I construct the bar of sheet metal, preferably sheet-steel and folded on longitudinal lines, as shown in Fig. 1, these lines of fold converging from the middle of the sheet toward its opposite ends in order that a completed bar shall taper toward its ends. The fold-lines are so positioned that when the sheet is folded up the bar shall have an I formation in cross-section,as shown in Fig. 3,the parts of the sheet forming the web being secured together by rivets or otherwise. This method of making the bar imparts to it great strength with a minimum degree of weight. It also enables the bar to be made entirely of sheet metal and to be given any desired taper without mutilating the metal in the least and without destroy ing the desirable I-beam formation in crosssection.

In Fig. l, a designates the portions of a sheet which when folded form the web portion of the bar; b, the portions which form the outer thicknesses of the two ilanges, and c the parts which form the inner thicknesses of the folding the sheet.

the edge portions of the sheet, as well as the.

central portion, come together and abut closely to form the web, the raw edges of the sheet terminating in the web, leaving no rough edges that require finishing, the longitudinal edges of the ianges being rounded in the process of The several thicknesses of the web and the flanges abut closely together, so as to mutually brace each other and form a bar which shall have an even greater strength than a solid rolled bar of the same cross-seci tion. The iinished bar may be left as shown in Figs. 2 andBor 'its llanges may be folded down, as shown in Figs. 4 and 5, until they abut along their longitudinal edges, and thereby form a bar having a substantially cylindrical shape, tapering from its middle toward its ends. If desired, the channels between the flanges may be filled in with suitablyshaped bars, ofl wood or other material, as shown in Figs. 6, 7, 8, 9, and 10; but in view of the great strength imparted to the bar by the I Iformation these filling-bars need notbe made out of the hardwoods usually employed for these devices, so that the use of these wood fillings will not add greatly to the cost of the bars. As shown in Figs. 7, 8. 9, and l0 the flanges need not come together along the length of the bar, but may be made shorter, so as to terminate short of each other and leave portions of the wood [illings exposed. As also shown in these iigures the bar may be given any desirable shape in crosssection from a true cylindrical form to an elliptical or oval form, as may be desired. This capability of giving the bar a variety of shapes in cross-section and enabling it to be tape'red to any desired degree arises from the fact that it is constructed of sheet metal folded on longitudinal lines, it being obvious that it is simply necessary to converge the fold-lines to the desired degree. The plate may be folded by any suitable mechanism; but I propose folding them in dies especially made for the purpose and in such a manner that several of the folds can be made simultaneously with a single die.

IOC)

It will be observed that a feature of importance lies in bringing the edge portions of the sheet into the web in order that not only the raw edges of the sheet shall be practically inclosed and hidden, but also that these portions shall contribute their strength to the web where it is most needed.

Instead of making the bar of a single sheet of metal it may be made of two sheets, as shown in Figs. 9 and l0, this form having the advantage of greater ease in folding and greater strength of web, since the web will contain four plies or thicknesses of metal in View of the fact that the edge portions of both sheets overlap and terminate in the web. These overlapped parts of the sheets are fastened together by rivets or in any other suitable manner in the same Way as shown in Fig. 2. A bar thus made of two sheets is tapered in the-same manner as a single sheetbar shown in the other views.

The letter e in Fig. l designates the holes formed in the sheet for the passage of the pivotal bolt -of the bar at its center, these holes being sopositioned that they register with each other at the top and bottom of the bar when the sheet is folded. 'I`he plies constituting the web are bent outward sufciently at the center of the bar or wherever a bolthole is desired, as shown in Figs. 2 and l1, to form a bolt-passage coincident with said holes and extending entirely through the bar.

It will be obvious that this bar is capable of use as a neck-yoke, swingletree, or doubletree and that when the proper dies are once constructed it will be extremely cheap to manufacture.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-- l l. A neck-yoke or the like, consisting of sheet metal folded longitudinally, the folded parts being brought together to form a central web and oppositely-e'xtending top and bottom lianges, the lines of fold being converged toward the ends of the sheet to give a tapering form to the bar.

2. A neck-yoke or the like, constructed of sheet metal folded longitudinally, the folded parts being brought closely in contact to form a web and oppositely-extending top and bottom flanges, the lines of fold being converged toward the ends of the sheet so that the completed bar shall be oppositely tapered.

3. A neck-yoke or the like, consisting of sheet metal folded longitudinally to form a central web and oppositely-extending top and bottom Hanges, the outerthicknesses of the flanges being provided with bolt-holes and the thicknesses forming the web being laterally bent coincident with said bolt-holes, thereby forming a bolt-passage through the bar.

4. A neck-yoke or the like, consisting of sheet metal folded longitudinally to form an oppositely-tape-ring central web and top and bottom flanges, the web and flanges being composed of two or more thicknesses, and the flangesv being bent inward toward each other to give a rounded form to the bar in crosssection.

5. A neck-yoke or the like, formed of sheet metal folded longitudinally to form a central web and top and bottom flanges, the lines of fold tapering toward each end so as to give a tapering form to the bar, and fillings inserted in the channels formed by the top and bottom flanges.

6. A neck-yoke or the like, constructed of longitudinally-folded sheet metal, the lines of fold converging toward the end of the sheet metal and the plies or thicknesses being brought together to form a central web and top and bottom flanges of two or more thicknesses, filling-pieces inserted in the channels formed by the flanges, said lilling-pieces being held in the channels by bending inward said anges upon the filling-pieces.

In testimony-whereof I hereunto aix my signature, in the presence of' two witnesses, this 19th day of February, 1904.

GEORGE A. LAMBERT.

Witnesses:

E. W. LONGANECKER, GLAD. S.. KING. 

